Subaru 2003 LEGACY Quick Reference Index page 49

DIAGNOSTIC CHART WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK FUSE NO. 6 (IN JOINT BOX).
1) Confirm that the ignition switch is turned
OFF.
2) Remove No. 6 fuse (in joint box) and per-
form visual inspection.
Is fuse No. 6 blown?
2 CHECK AIRBAG CONTROL MODULE.
1) Turn the ignition switch OFF, disconnect
the battery ground cable, and wait more
than 20 seconds.
2) Disconnect the connector (AB6) from air-
bag control module. <Ref. to AB-17, Airbag
Control Module.>
3) Connect the connector (1I) in test harness
I2 to connector (AB6).
4) Connect the battery ground cable, and turn
the ignition switch ON.
5) Measure the voltage between the connec-
tor (2I) in test harness I2 and the chassis
ground.
Connector & terminal
(2I) No. 6 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
3 CHECK AIRBAG MAIN HARNESS.
1) While checking control module, turn the
ignition switch OFF and disconnect the bat-
tery ground cable. Wait more than 20 sec-
onds before operation.
2) Disconnect the airbag connector (AB1)
from the body harness (B31).
3) Measure the voltage between the connec-
tor (B31) and the chassis ground.
Connector & terminal
(B31) No. 11 (+) — Chassis ground ( − − − − ):
Does the measured value exceed the spec-
ified value?
Value
Fuse No. 6 is not blown.
10 V
10 V
AB-47
AIRBAG SYSTEM (DIAGNOSTICS)
Yes
Go to step 2. Replace fuse No.
6. If fuse No. 6 is
blown again,
repair the body
harness.
Replace the airbag Go to step 3.
control module.
<Ref. to AB-17,
Airbag Control
Module.>
Replace the airbag Repair the body
main harness. harness.
<Ref. to AB-15,
Main Harness.>
No